# Difference between Type{T} and T when passing type variable inside generated function?

**URL:** <https://discourse.julialang.org/t/difference-between-type-t-and-t-when-passing-type-variable-inside-generated-function/38121>\
**Category:** General Usage\
**Created:** [April 24, 2020, 2:11am UTC](https://discourse.julialang.org/t/difference-between-type-t-and-t-when-passing-type-variable-inside-generated-function/38121 "2020-04-24T02:11:35Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![sairus7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sairus7/32/10816_2.png) [@sairus7](https://discourse.julialang.org/u/sairus7)\
**Post date:** [April 24, 2020, 2:36am UTC](https://discourse.julialang.org/t/difference-between-type-t-and-t-when-passing-type-variable-inside-generated-function/38121/3 "2020-04-24T02:36:31Z")

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I want to generate the most efficient code to read binary stream into given combination of types. Simply generate repeating reads given a tuple of types. See #2 [here](https://discourse.julialang.org/t/macro-for-binary-data-deserialization-into-tuples-of-variable-types/38088), and further performance comparison.

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